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Intelligent mobile phone module

This application claims priority to Taiwan Application Serial Number 95150016, filed Dec. 29, 2006, which is herein incorporated by reference.

1. Field of Invention

The invention relates to an intelligent mobile phone module and, in particular, to an intelligent mobile phone module with an assisted-GPS (A-GPS) function.

2. Related Art

The first generation (1G) mobile phone simply provides the voice conversation function. Although it has the ability of long-distance communications, its security is not good and it may be duplicated. Therefore, it has been phased out from the market. With progress in the technology, the second generation (2G) mobile phone can provide functions other than voice communications. Moreover, some additional and basic digital communication functions are defined to provide better security. The 2G mobile phone mainly uses a digital modulation system, including the European global system for mobile communications (GSM) standard and the American code division multiple access (CDMA) standard.

With higher demands in data transmissions, the third generation (3G) mobile phone puts more emphasis on the digital communications via broadband wireless telecommunications, in addition to simple voice conversions. Therefore, the mobile phone is able to enter the Internet world. A primary difference between the 2G mobile phone and the 3G phone is that the 3G mobile phone defines its minimum data transmission rate to be 144 kbps when it is in motion and 384 kbps when it is indoors. It mainly utilizes the CDMA as its core technology standard. Currently, 3GPP and 3GPP2 recognize three sets of 3G technology standards, the European WCDMA (Wideband Code Division Multiple Access) standard, the American CDMA2000 standard, and the Chinese TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) standard.

Most of the traditional mobile phones on the market are dual-band or triple-band. The dual-band ones switch the frequency between 900 GHz and 1800 GHz, whereas the triple-band ones switch among 900 GHz, 1800 GHz, and 1900 GHz. Due to the limited band resources, some countries have opened the 850 GHz band for the GSM (2G) or GPRS (2.5G) systems. In the United States, the 850 GHz band is mainly used to enhance the network function in high-density areas of large cities. In South America, many countries only use the 850 GHz band. The quad-band mobile communication systems include the 850 GHz band to support multimedia applications, high-speed connections, and fast-speed audio and video data downloads. This helps toward the goal of global roaming for the mobile phones.

Besides, the mobile phone further combines the global positioning system (GPS) and its own mobile communication system to render the A-GPS mobile positioning technology. The basic operating principle of the A-GPS technology is based upon the GPS. The client holds a GPS-like device to receive satellite signals. The network has in addition a receiver for receiving signals. The positioning information is sent back to the client. Combining the information of the client and the network, the client is able to obtain more precise positioning result. This solves the problem of being unable to receive the GPS signals sometimes in the metropolitan area and indoor environment.

The A-GPS technology can combine with the current wireless communication network to implement the positioning function with higher precisions. However, the cost also soars as the functions become more complicated. Therefore, it is an important goal of the field to provide cheaper new-generation mobile phones that can integrate the A-GPS technology and the mobile communication technology on the same electronic device.

Due to the advances in telecommunication technology, the communication standards in the world become more complicated. Therefore, it is an important objective for the mobile phone manufacturers to provide a new generation phone with better functions but at a lower cost.

An objective of the invention is to provide an intelligent mobile phone module with the CDMA, quad-band GSM, and A-GPS functions.

Another objective of the invention is to provide an intelligent mobile phone module that uses the 2G telecommunication basis and the 2G telecommunication functions to enhance the precision of positioning using the GPS function and network data.

In accord with the above-mentioned objectives, the invention discloses an intelligent mobile phone module that includes a main antenna, an assistant antenna, a switch, a first chipset (e.g. an RTR6275 chipset), a triplexer, and a second chipset (e.g. an RFR6500 chipset). The main antenna receives and transmits quad-band GSM signals (such as GSM850, GSM900, GSM1800, and GSM1900), CELL850 signals, and PCS1900 signals.

The assistant antenna assists to receive the CELL850 signals, PCS1900 signals and GPS1500 signals. The switch is coupled to the main antenna for selecting a desired input or output signal for the main antenna.

The first chipset is coupled to the switch for processing the input and output signals of the quad-band GSM signals and the output signals of CELL850 and PCS1900. The triplexer is coupled to an assistant antenna for selecting a desired input signal for the assistant antenna. The second chipset processes the CELL850, PCS1900, and GPS1500 input signals.

The intelligent mobile phone module further includes GSM850 and GSM900 filters coupled between the switch and the first chipset for extracting GSM850 input signals and GSM900 input signals, and GSM1800 and GSM1900 filters coupled between the switch and the first chipset for extracting GSM1800 input signals and GSM1900 input signals. For the assistant antenna, a PCS1900 filter is coupled between the triplexer and the second chipset for extracting PCS1900 input signals from the assistant antenna. A CELL850 filter is used to extract CELL850 input signals from the assistant antenna. Finally, a GPS1500 filter is used to extract GPS1500 input signals from the assistant antenna.

Besides, the second chipset can also use a PCS1900 filter and a CELL850 filter to respectively extract PCS1900 and CELL850 input signals from the main antenna.

Between the second chipset, the first chipset, and the switch, a CELL signal transceiver is used to switch between CELL850 signal transmission and reception. Moreover, a PCS signal transceiver is used to switch between PCS1900 signal transmission and reception.

For signal transmissions, the main antenna further includes a high-pass filter coupled between the first chipset and the switch for outputting high-frequency output signals, such as GSM1800 and GSM1900 output signals, to the main antenna. It may include a low-pass filter coupled between the first chipset and the switch for outputting low-frequency output signals, such as GSM850 and GSM900 output signals, to the main antenna.

This intelligent mobile phone module also uses a MSM6800 chipset to implement CDMA2000 1xEV-DO and to enhance its multimedia functions. In particular, the switch is a multi-point circuit switch, and the assistant antenna is a diversity antenna.